Researchers at Harvard Medical have found that elite athletes like marathon runners have more of a gut microbe, Veillonella, that gives them an endurance boost. They’re working on turning it into a probiotic so us slowpokes can get a boost, too. (Credit: lzf/Shutterstock)

More and more, researchers have been studying how your gut microbes might be making you sick. Scientists have linked these vital bugs to everything from schizophrenia, to autism, allergies and obesity. But what do the micro